Fig. 8: Generation of sequences of discretely graded activity in a network of W-B neurons with asymmetric connectivity.
From: An oscillatory mechanism for multi-level storage in short-term memory
a Schematic of network structure. Asymmetric connectivity underlies slow drift of activity bumps. b Illustration of low-rate problem in a sequential-activity network of conductance-based spiking neurons without oscillatory input. Drifting bumps of activity in the network initiated by short (100 ms) pulses (labeled by colored bars) exhibit only a single level of activity. c Sequential-activity network with oscillatory input is able to maintain drifting bumps with discretely graded levels of activity.
